Not Receiving Emails on ZImbra Server

[abhiz]

Hi ,

I installed open zimbra on ubuntu 8.04 32 bit version .I can send emails from my server but I cannot receive emails .
The error which i got is connction time out at port 7025

My server is behind pix 506e firewall I have already open port 7025 on pix.
Selinux not installed on my server firewall also not installed .If I disable dnslookup from mta tab then I can receive emails but cannot send emails.I am new to zimbra despirately need help .

Thanks
Abhiz

[phoenix]

Do you have a Split DNS set-up? If not, you need one and as you're on Ubuntu then read this article: http://wiki.zimbra.com/index.php?title=Ubuntu_6.06_Server_(Dapper_Drake)_ Beginner's_Install_Guide#DNS